Well pump



Jan. 4, 1944- w. E` REMBERT WELL PUMP Filed Sept. 7, 1942 2 Sheets-Sheet 2 Snvcntor vWil/fav?) E. Pemer Q .7 M Gttorneg Patented Jan. 4, 1944 UNITED STATES PATENT OFFICE WELL PUMP William E. Rembert, Shreveport, La.

Application September 7, 1942, Serial No. 457,534

(Cl. S-219) I Claims.

My invention relates to well pumps and more especially to oil Well pumps.

An object of my invention is to provide a Well pump employing the old style pumping barrel and sucker rod commonly used for pumping oil in which the Well casing is used as the fluid conduit and the tubing is used as a sucker rod guide.

Another object of my invention is `to provide in a well pump a packer designed to be placed in the well casing in its operating position by the Well tubing and to be removed from the well casing by the Well tubing.

Another object of my invention is to provide in a well pump a packer so connected to a string of tubing that the packer may be jarred out of its set position by the tubing.

Applicant does not lay claim to being the inventor broadly of a Well pump employing a pumping barrel and sucker rod in which the fluid pumped is carried up to the surface of the ground through a string of tubing inside of the Wells casing, for this is one of the established Ways of pumping oil today. Applicant is also aware of the type of Well pump employing a pumping barrel and sucker rod that eliminates the tubing entirely in which the casing is used as a fluid conduit. The second mentioned known method of pumping in most instances has been found to be unsatisfactory for the reason that the sucker rod would Wear holes through the casing and ruin the Well. This trouble necessitated the employment of the tubing inside of the casing. While the use of tubing prevented the Wear of the sucker rod on the casing, diiiiculties arose out of the use of the tubing itself. In deep Well pumps Where the tubing is extremely long, the stretching of the tubing itself during the pumping operation in some instances wore holes through the casing. My invention, to be explained in more detail later, solves both of the problems met with in the above described standard practices. Due to the fact that in my invention in oil Well pumps the iluid is conducted through the .casing only, the tubing does not stretch during the pumping operation; but because of the presence of the tubing, the suckerv rod is prevented from rubbing on the casing.

, Stating it another way, by employing my pumping mechanism neither the tubing nor the sucker rod is permitted to rub the casing.

Whereas in my pumping mechanism the tubing is used principally as a guide, it does not have to be water tight in its joints. Old leaky tubing, that can be bought cheaply, may be used in place of new tubing. The tubing employed in vmy pumping mechanism in addition to serving as a sucker rod guide serves also as a means of placing and removing a packer forming a part of my pump. The Weight of the tubing itself is used to expand the packer.

For the purpose of further explaining my invention I have illustrated in my drawings an oil Well pump embodying the principles of my invention.

In the drawings:

Figure 1 is an elevation view in part cross section showing my pumping device before being set in its pumping position in a Well casing,

Figure 2 is a vertical view in part cross section showing my well pumping device after it has been set in a well casing in its operating position,

Figure 3 is an enlarged vertical view in part cross section of the upper portion of my Well pumping device and,

Figure 4 is an enlarged vertical view in part cross section of my pumping device.

Referring to the drawings, numeral I designates a string of Well casing. Numeral 2 designates a string of tubing. By means of one of the upper tubing collars 3, a swage nipple 4 is attached to the lower end of the string of tubing. A steel bushing l5 is connected to the sWage nipple 4 by means of a coupling collar 6 similar to the upper tubing collar 3. The steel bushing 5, the coupling collar 6, the sWage nipple 4, the upper tubing collar 3 and the tubing 2 are made up tight and are designed to stay in made up l position both before and after the setting of my pumping mechanism. The upper mouth of the steel bushing 5 is provided With a right handed tapered thread adapted to engage in a releasable fashion tapered threads of a packer stem I0 supporting mechanism hereafter described. The steel bushing 5 is provided with ports 1 aligned to communicate with slots I I in the packer stem. Deiiectors y8 are provided on the steel bushing 5 over the exits of the ports 1 to prevent jets of the pumped oil or other uid from striking the casing I and Wearing holes in it. The deflectors 8 are purposely placed above the ports I to delect the oil or other fluid down onto the upper surface of the packer shoe 9 to prevent sediment from settling on the casing I around the ports l. The packer stem I0 is in fact but a modied section of the tubing 2 and for most purposes of my invention it is to be considered as a continuation of the tubing 2. The mechanism mentioned above as being supported by the packer stem I0 is the collar shaped expandable packer I2 which is provided with a disc shaped pressing plate I3 on which the shoe t of the steel bushing rests in the set position of my pump as shown in Figure 2 and Figure 3 of the drawings. The packer l2 is provided also with a flat pressing plate I4 that rests on a cone shaped collar I5, in addition to acting as a means for connecting the packer stem it to the lower length I6 of the packer stem I0, acts as a spreader to spread the toothed slips Il' into biting position on the casing I. Two or more toothed slips Il may be employed. The toothed slips il are provided with feet IS which fit into radial grooves 2li of the toothed slips support It. The toothed slips support I9 loosely fits around the lower length It of the packer stem it and is supported by the upper collar 22 of the friction cage 2i. The lower collar 23 0I the friction cage 2 I is provided with internal tapered threads 24 into which the spring sleeve 25 is releasably connected. A helical compression spring 2t is mounted around the spring sleeve 25 and separated from the lower collar` 23 by means of a ball bearing racer 2l. The spring sleeve 25 is larger than the lower tubing length I6 of the packer stem Ill and its loosely around it. The spring sleeve'l is welded to the lower end of the lower length It ci the packer stem I0. The tubing collar 28 connects the lower length I6 of the packer stem I to the tubing 2 to which the pumping barrel 29 is attached. A sucker rod 30 eX- tends into the pumping barrel 29 and is attached to a piston, not shown, in the pumping barrel 29.

As my invention does not relate to improvements in either pumping barrels or sucker rods, no further mention of them is necessary except to say that the pumping barrel 29, the tubing 2, the lower tubing collar 23, the two le-ngths of packer stem I 0 and the cone shaped collar I5 joining the lengths of the packer stem Ill are all made up tight and remain so during both the setting of my pump and during its pumping operationl My pumping device in its unset or expanded position as best shown it Figure l should be first shoved down into the casing I to the proper depth for pumping oil or :other uid. The friction cage 2i grips the side of the casing I in the lowered position of my pump to permit the unscrewing of the sleeve from the lower collar 23 by a right hand turning motion of the tubing 2. The spring sleeve 25 is removably fastened to the lower collar 23 by right handed threads. The ball bearing racer 2l cuts down the friction between the compressed compression spring 26 and the lower collar 23. The ball bearing racer '2l while not absolutely necessary is useful in my device for the reason stated above.

The spring sleeve 25 must be parted from the lower collar 23 to permit the compression spring 25 to shove the lower collar 23, the friction cage 2l, the toothed slips support I9 and the toothed slips l l assembly upwardly until the toothed slips il are pushed out into biting contact on the casing l by the cone shaped collar I 5 which spreads them. As soon as the toothed slips I1 are anchored on the sides of the casing I, they will support the full weightcf the packer stem IU, the steel bushing 5, the swage nipple 4, and all of the tubing above the same.

As mentioned earlier, the packer stem lil is connected to the steel bushing 5 by means of right handed threads. This tact makes possible the easy separating of the packer stem I from the steel bushing 5 by further right hand turning of the tubing 2. When the packer stem I0 and the steel bushing 5 are parted, the tubing 2, the swage nipple 4, and the steel bushing 5 connected thereto may be lowered to the position shown in Figure 2 where the packer shoe t rests on the disc shaped pressing plate i3 to permit the weight of the tubing 2, the swage nipple il, and the steel bushing 5 to expand the packer l2 in water tight engagement with the casing i and the packer stem It. In the foregoing described set position of my pump, my pump may be operated just as any prior art pump employing a sucker rod and pumping barrel is operated. I pump oil or other fluid up through the packer stern Il) to the slots I I of the packer stem Iii in accordance with prior art practice. From the slots I I on upwardly, however, my pumping practice is different, for instead of pumping the oil or other luid all the way up to the surface of the ground through the tubing 2, I pass the pumped oil or other iiuid through the slots II and through the ports l which are aligned with the same. The oil or other fluid pumped by my pump is first deflected downwardly by the deflectors 8 as stated earlier in this disclosure. The oil or other fluid pumped after leaving the ports l travels up through the casing I, around the swage nipple 4 and the tubing 2 above it as shown by the arrows in Figure 3 of the drawings.

In addition to the various advantages my invention brings to the practice of pumping oil as brought out in the foregoing description, I want to here point out to the reader that since my packer i2 is not an integral part of the packer stem Ill and pumping barrel 29, my packer I2 will not be disturbed by vibrations of the packer stem Iii during pumping operations.

In my invention in well pumps the tubing 2 supports the packer I2 by means of the swage nipple l and the packer stem I] in a manner that it can never become completely disconnected from the tubing 2 I leave a certain amount or slack in the connection between the tubing 2 and the packer I2 so that should the packer i2 ever stick tight to the casing I it could be jarred loose by snatching up suddenly on the tubing 2. This feature, as far as I know, is entirely new in well packer constructions.

In using my invention in well pumps as described above, the well operator is enabled to seal off fluid in a well by means of my packer I2 and then take oit oil through a perforated section of the tubing 2 at a place below the packer I2 opposite the tcp of a producing formation.

At the top of the well the pumped oil or other uid may be taken away from the well either through the casing I or through the tubing 2 if the tubing 2 is perforated near its upper end to permit the stream of oil or other pumped iiuid to travel from the casing I back through the tubing 2 and on out when the upper end of the casing I is closed. Under these conditions with the tubing open and exception to the general statement earlier made to the eect that I pump the oil up through the casing with the tubing closed does not hold true strictly, for under these changed conditions it is apparent that oil may be made to travel upwardly through both the tubing and the casing. Under conditions where the tubing is defective and has holes in it slight amounts of oil may travel up through the tubing to exude through such holes into the surrounding casing member even when the tubing is closed oi at the surface of the ground. The casing I mentioned in my description'is the usual type steel casing commonly used. The tubing 2 is the standard steel tubing in common practice. The packer I2 should be made out of rubber or some other compressible material. The friction cage 2| should be made out of spring steel or other spring material. The compression spring 26 should be made out of spring steel, spring bronze, or other spring material. The other parts of my pump could be made out of steel or other materials used in similar well equipment.

It is to be understood that various changes in the shape, size and arrangement of the parts of the device I have illustrated and described which embodies my invention may be resorted to without departing from lthe scope of my invention.

Having thus described my invention, I claim:

1. In a well pump. the combination of a string of casing, a string of tubing within the casing, a packer stem connected at its upper end to the string of tubing, a pumping barrel connected on the packer stem at its lower end, a string of sucker rod extending through the string of tubing and the packer stem into the pumping barrel and a packer placed in an encircling position around the packer stem above the pumping barrel and below the string of tubing to provide a water tight seal between the casing and the tubing, said packer stem being perforated at a place above the packer to permit pumped fluid to travel upwardly inside of the casing and on the outside of the tubing.

2. The device as claimed in claim 1 wherein the string of tubing is connected to the packer stem by means of a telescoping slip joint to permit a. jarring force to be applied to the packer stem by the string of tubing.

3. The device as claimed in claim 1 wherein the tubing at its lower end is provided with a loose fitting sleeve surrounding the packer stem to permit the string of tubing to be set down on the packer to expand it,

4. The device as claimed in claim l wherein the string of tubing is connected to the packer stem by means of a sleeve, the lower portion of said sleeve extending beyond the perforated prtion of the packer stem, said sleeve being provided with one or more perforations aligned with the perforations in the packer stem whereby pumped iiuid may ow directly into the casing, said sleeve being provided with one or more deflectors adapted to divert pumped iiuid passing through the sleeve in a downward direction.

5. In an oil well pump for use in a casing, the combination of a packer and a packer setting means comprising a string of tubing provided at its lower end with a slip joint, said slip joint including a rigid member attached to the lower end of the string of tubing and a packer supporting member telescopically connected with and depending from the rigid member, said packer comprising a slip adapted to grip the side walls of a casing and support the weight of the packer and the entire weight of a string of tubing, a slip spreader located above the slip, said slip spreader being directly attached to the packer supporting 4'member, a yieldable packing member surrounding the packer supporting member and supported by the slip spreader and a slip pushing means secured to the packer supporting member adapted to push the slip up against the slip spreader.

6. The device as claimed in claim 5 wherein the slip pushing means includes a spring 4cage movably mounted on a tube extending through the slip, said cage being adapted to press against the side walls of the casing, a spring supporting tube surrounding the rst mentioned tube and releasably connected to the lower end of the cage, the spring supporting tube being permanently fastened to the first mentioned tube extended through the slip and spring supporting tube and a compression spring supported by the spring supporting tube and in contact with the lower end of the cage and being adapted to shove the cage and slip above the cage upwardly against the slip spreader when the spring supporting tube is released from the cage.

'7. The device as claimed in claim 5 wherein the rigid member of the slip joint includes a swage nipple with a diverging internally threaded conical shaped portion and wherein the packer supporting member terminates at its upper end in an expanded conical shaped threaded end portion, said expanded conical shaped end portion being threaded to fit the diverging internally threaded cone shaped portion of the swage nipple.

WILLIAM E. REMBERT. 

